5-20x^(2)

The equation whose roots are diminish by 3 then those of x^(4) - 5x^(3) - 20x^(2) + 3x + 17 = 0 is

Assertion : The zeroes of the polynomial 5x^(5)-20x^(4)+5x^(3)+50x^(2)-20x-40 are 1 and 3. Reason : x=r is a zero of a polynomial p(x), if it is a solution of the equation P(x) = 0.

Find all the zeroes of 4x^(4)-20x^(3)+23x^(2)+5x-6 if two of its zeroes are 2&3.

Obtain all the zeroes of the polynomial   x^(4)+4x^(3)-2x^(2)-20x -15   , if two of its zeroes are sqrt(5) or - sqrt(5) .

Obtian all other zeroes of (x^(4)+4x^(3)-2x^(2)-20x-15) if two of its zeroes are :' sqrt(5) and -sqrt(5) .

Factorise : (viii) 5x^(2) - (20x^4)/( 9)

Factorise each of the 5x +20 2n^(2)+3n